Ornamental chain



FIG. 1 is a front elevational view of an ornamental chain showing my new design, the rear is symmetrical to the view shown;

FIG. 2 is the right side view of the chain of FIG. 1. The left side is symmetrical;

FIG. 3 is the top view of the chain of FIGS. 1 and 2; and,

FIG. 4 is the bottom view of the chain of FIGS. 1, 2 and 3. 

An ornamental design for an ornamental chain, as shown and described. 